Black helicopters

Wednesday, August 29, 2007

How cell phones work.Well just a little info about Cellphones. They have dedicated towers for different companies. So if you have sprint your phone will first ping a sprint tower. If you have a dual band phone which I have it will roam or search for a signal. It will only do this if you have the phone set up to do this though. My phone will also roam on any tower as long as it is set up to do so. The latest in cell phone technology is that all new phones have a locator chip so in the case of an emergency the highway patrol can locate you. This is a GPS type of chip but it does not work like a standard GPS device. It relies on tower triangulation. A tower is pinged and they base it on the signal strength of your phone between several towers and they can locate you. It is actually fairly accurate up to 100 yards. So if the tower that both of Joe’s cell phones pinged was for Joe and Harlow’s service company then Joe’s phone would have pinged the same tower. You see there are several towers in the same area but do they all cover the same companies? Cell phones ping a tower and then the call goes through conventional phone lines and then to the tower nearest you and it locates your phone and your call is completd. So if the service provider only had the one tower in the area it would use that tower unless your phone was roaming. Then it would ping the nearest tower. We have all had dropped calls so we know that the technology is good but it is no way near perfect. Also as you travel your phone will jump form tower to tower along your travel path. This is done by the circutry in your phone and the information it sends to the nearest cell tower. I'm sure that if you turn your phone off it can take a few seconds for it to be operational again when you turn it back on. it will search for a signal and that is how it locates a tower. It is this process that allows you to travel with your phone and stay in contact with the person that you are talking to. So in effect a Cellphone is a digital two-way radio. This information is from the Sprint and Verizon websites.

Elm the most fascinating story I ever heard about Cell Phones is the Hedy Lamarr story! That this Hollywood Starlet with her husband were inventors of the technology behind CDMA which allows digital cell networks to remain secure.

This was originally created to maintain wireless control of Torpedoes!